Sealing mechanism, puncture outfit and surgical robot

Abstract

The invention relates to the technical field of surgical robots, and discloses a sealing mechanism, a puncture outfit and a surgical robot. The sealing mechanism comprises a packaging shell and a sealing assembly. A penetrating channel is formed in the packaging shell in a penetrating manner; the sealing assembly is arranged in the packaging shell and comprises a first sealing piece and a second sealing piece, the first sealing piece is sleeved with the second sealing piece at intervals, the first sealing piece comprises a first ring part, a second ring part and a conical ring part which are sequentially connected, the wall thickness of the second ring part is gradually increased, and the wall thickness of the conical ring part is gradually decreased. And the sealing ring sequentially passes through the first ring part, the second ring part and the conical ring part and hermetically penetrates through the small end of the conical ring part. Durability of the puncture outfit is guaranteed, the number of deformation positions of the first sealing part is increased, the deformation quantity of each deformation position is reduced, and resetting of the first sealing part is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical robots, and in particular to a sealing mechanism, a puncture device and a surgical robot. Background Art

[0002] Surgical robots are widely used in the medical field. During surgery, the user controls the movement of a robotic arm, thereby manipulating the surgical instruments to perform surgical procedures on the patient. A trocar is attached to the end of the robotic arm. This trocar forms a surgical channel for the surgical instruments to pass through.

[0003] The puncture device includes a sleeve and a sealing structure. The sleeve is used to pass through the patient's abdominal wall, and the sealing structure is used to prevent the loss of gas in the patient's abdominal cavity. Referring to the disclosure of Chinese patent CN222676387U - A sealing structure, a puncture assembly and a surgical robot, the sealing structure includes a sealing shell, a first sealing member and a second sealing member. The sealing shell is placed in the sleeve. A penetration channel is provided on the sealing shell, and the puncture needle or surgical instrument can be penetrated into the sealing structure through the penetration channel. The first sealing member and the second sealing member are placed in the sealing shell and connected to the sealing shell. When the puncture needle or surgical instrument is penetrated into the sealing structure, the conical air injection valve port of the first sealing member is sealed and connected to the puncture needle or surgical instrument to achieve a sealing effect. When the puncture needle or surgical instrument is pulled out, the opening valve of the second sealing member closes the opening of the second sealing member to achieve a sealing effect.

[0004] In the prior art, when a puncture needle or surgical instrument is inserted, for the first seal, only the air injection valve port is deformed, resulting in a large deformation amount, and the first seal is prone to fatigue, which affects the durability of the puncture device; when the puncture needle or surgical instrument is pulled out, the first seal cannot be reset in time, which hinders the reinsertion of other surgical instruments and affects the smooth implementation of the operation.

[0005] Based on this, there is an urgent need for a sealing mechanism, a puncture device and a surgical robot to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of the present invention is to provide a sealing mechanism, a trocar and a surgical robot to ensure the durability of the trocar, increase the number of deformation positions of the first sealing member, reduce the deformation amount at each deformation position, and facilitate the resetting of the first sealing member.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Sealing mechanism, including:

[0009] The packaging shell is penetrated along the first direction to form a penetration channel;

[0010] A sealing assembly is placed in the packaging shell and includes a first sealing member and a second sealing member, both of which are cylindrical. The second sealing member is sleeved on the first sealing member and spaced apart from the outer wall of the first sealing member. The first sealing member includes a first ring portion, a second ring portion and a conical ring portion arranged axially along the penetration channel. The second ring portion is connected between the first ring portion and the conical ring portion. The wall thickness of the second ring portion increases from the first ring portion toward the conical ring portion, and the wall thickness of the conical ring portion decreases in the direction away from the first ring portion. The small end of the conical ring portion is arranged opposite to the first ring portion. When the puncture needle or surgical instrument penetrates the sealing assembly, it passes through the first ring portion, the second ring portion and the conical ring portion in sequence, and seals through the small end of the conical ring portion.

[0011] As an optional technical solution of the sealing mechanism, the first sealing member further includes a third ring portion, the wall thickness of the third ring portion is a constant value, and the third ring portion is connected between the second ring portion and the conical ring portion.

[0012] As an optional technical solution of the sealing mechanism, the outer diameter of the third ring portion is a constant value.

[0013] As an optional technical solution for the sealing mechanism, the packaging shell includes a top cover, which is placed on the side of the first sealing component away from the conical ring portion along the first direction. A guide ring is connected to the top cover, which is placed in the first sealing component. The end of the guide ring away from the top cover extends to the third ring portion.

[0014] As an optional technical solution of the sealing mechanism, the distance between the inner side wall of the third ring portion and the outer side wall of the guide ring is smaller than the distance between the outer side wall of the third ring portion and the inner side wall of the second sealing member.

[0015] As an optional technical solution of the sealing mechanism, an inner side wall of the guide ring at one end away from the top cover is provided with an inclined annular surface, and the diameter of the inclined annular surface increases in a direction away from the top cover.

[0016] As an optional technical solution of the sealing mechanism, the outer diameter of the second ring portion decreases in a direction away from the first ring portion; and / or the outer diameter of the first ring portion is a constant value.

[0017] As an optional technical solution of the sealing mechanism, the wall thickness of the first ring portion is a constant value; or the wall thickness of the first ring portion decreases in a direction toward the second ring portion.

[0018] The puncture device comprises a sheath tube and the sealing mechanism as described above, wherein the sealing mechanism is placed in the sheath tube, and the puncture channel is coaxially arranged with the sheath tube.

[0019] A surgical robot comprising the puncture device as described above.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a sealing mechanism, a trocar, and a surgical robot. The sealing mechanism includes an encapsulating shell and a sealing assembly, the trocar includes the sealing mechanism and a sheath, and the surgical robot includes the trocar. Because the connection between the first and second ring portions is thin, during penetration of a puncture needle or surgical instrument into the sealing mechanism, deformation may occur not only at the tapered ring portion but also at the connection between the first and second ring portions. In this embodiment, the structure is simple, and the number of deformation positions of the first seal is increased, which reduces the deformation amount at each deformation position, facilitates the resetting of the first seal after the puncture device or surgical instrument is pulled out, and facilitates the reinsertion of other surgical instruments. It also reduces the possibility of damage to the first seal due to the large deformation amount at the same position, improves the fatigue strength of the first seal, improves the durability of the sealing mechanism, avoids the need to replace the sealing mechanism during surgery, reduces costs, and enables the sealing mechanism to reliably achieve a sealing effect, ensuring the safety of the surgery and the smooth implementation of the surgery; at the same time, the second ring portion and the tapered ring portion are thicker at one end facing each other, which reduces the possibility of the tapered ring portion completely turning up after the puncture device or surgical instrument is pulled out, and further facilitates the resetting of the tapered ring portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a schematic structural diagram of a trocar provided by an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the structure of the trocar provided by an embodiment of the present invention;

[0024] Figure 3 is a cross-sectional view of a trocar provided by an embodiment of the present invention;

[0025] Figure 4 is a structural schematic diagram of a sealing mechanism provided by an embodiment of the present invention;

[0026] Figure 5 is a structural exploded view of the sealing mechanism provided by an embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of a sealing mechanism provided by an embodiment of the present invention;

[0028] Figure 7 yes Figure 6 A partial enlarged view of point A in the middle;

[0029] Figure 8 is a schematic structural diagram of a top cover provided by an embodiment of the present invention;

[0030] Figure 9 is a structural schematic diagram of a second sealing member provided by an embodiment of the present invention;

[0031] Figure 10 is a schematic structural diagram of a mounting base provided by an embodiment of the present invention from a first perspective;

[0032] Figure 11 is a schematic structural diagram of a mounting base provided by an embodiment of the present invention from a second viewing angle;

[0033] Figure 12 yes Figure 11 A partial enlarged view of point B in the middle.

[0034] In the picture:

[0035] 10. Sheath; 101. Flanged edge; 20. Puncture needle; 30. Sealing mechanism;

[0036] 1. Top cover; 11. Guide ring; 111. Inclined annular surface; 12. First abutting ring; 19. Penetrating channel;

[0037] 2. First sealing member; 21. First ring portion; 22. Second ring portion; 23. Third ring portion; 231. First protrusion; 232. Second protrusion; 24. Conical ring portion; 241. End through hole; 25. First crimping edge;

[0038] 3. Second sealing member; 31. Sealing cylinder; 32. Sealing flap; 33. Second crimping edge;

[0039] 4. Mounting seat; 41. First section; 411. First rib; 412. Sealing ring; 413. Ventilation hole; 414. Ventilation groove; 42. Second section; 421. Reinforcement portion; 422. Connecting portion; 43. Step surface; 44. Fitting portion; 45. Second abutting ring;

[0040] 5. Air valve;

[0041] 6. Snap-fitting member; 61. Spacer; 62. Elastic connecting portion; 63. Pressing portion; 64. Snap-fitting portion; 65. Protruding ring;

[0042] 71. First positioning column; 72. Second positioning column; 8. Connecting tube; 9. Positioning hole. DETAILED DESCRIPTION

[0043] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] like Figures 1-12 As shown, this embodiment provides a surgical robot, which includes a doctor's console and a patient operating platform. The doctor's console includes a doctor's operating arm and a main trolley. The doctor's operating arm includes an arm connecting rod assembly and an input handle. One end of the arm connecting rod assembly is connected to the main trolley, and the input handle is provided at the other end of the arm connecting rod assembly. The patient operating platform includes a slave trolley and a tool holding arm. The slave trolley is provided on one side of the operating bed. One end of the tool holding arm is connected to the slave trolley, and the other end is used to install surgical instruments. During the operation, the patient lies on the operating bed. When the master-slave control mode of the surgical robot is turned on, the user holds the input handle of the master control arm and can control the movement of the tool holding arm through the input handle of the master control arm, thereby controlling the surgical instruments to perform surgical operations on the patient.

[0048] Among them, except for some structures of the surgical robot described in the previous and following texts, other structures of the surgical robot can refer to the existing technology and are not the focus of protection of this embodiment, so they will not be described here.

[0049] The surgical robot also includes a trocar, mounted on the end of the robot's arm. This trocar is used to penetrate the patient's abdominal wall to establish a surgical corridor for surgical instruments. This allows the instruments to pass through the trocar and into the patient's abdominal cavity for surgical procedures. Before surgery, gas is delivered to the patient's abdominal cavity through the trocar, creating pneumoperitoneum.

[0050] Specifically, if Figure 1 and Figure 2 As shown, the puncture device includes a puncture needle 20, a sheath 10, and a sealing mechanism 30. The sealing mechanism 30 is placed inside one end of the sheath 10. Before surgery, the puncture needle 20 passes through the sealing mechanism 30, and the tip of the puncture needle 20 exits through the other end of the sheath 10. The medical staff holds the puncture device through the patient's abdominal wall and into the abdominal cavity. Gas from an external gas source is introduced into the patient's abdominal cavity through the puncture device. After the puncture needle 20 is removed, the sheath 10 and the sealing mechanism 30 form a surgical channel for the passage of surgical instruments. The sealing mechanism 30 is provided with a passage 19, which is coaxial with the sheath 10. The puncture needle 20 and surgical instruments can pass through the passage 19. The axis of the sheath 10 extends along a first direction. When the puncture needle 20 and surgical instruments are inserted into or removed from the sealing mechanism 30, the sealing mechanism 30 can achieve a sealing effect, preventing the loss of gas in the patient's abdominal cavity.

[0051] Furthermore, the sealing mechanism 30 includes an encapsulation shell and a sealing assembly. The encapsulation shell is penetrated along the first direction to form the above-mentioned penetration channel 19. The encapsulation shell is placed in the first end of the sheath 10, and the sealing assembly is placed in the encapsulation shell. The sealing assembly includes a first seal 2 and a second seal 3, and the first seal 2 and the second seal 3 are both cylindrical. The axes of the first seal 2 and the second seal 3 are both coaxially arranged with the sheath 10. The second seal 3 is arranged at intervals on the first seal 2, that is, the second seal 3 is arranged on the outside of the first seal 2, and the second seal 3 is arranged at intervals from the outer wall of the first seal 2. When the puncture needle 20 or the surgical instrument is inserted into the sealing mechanism 30, the first seal 2 realizes a sealing effect, and when the puncture needle 20 or the surgical instrument is pulled out, the second seal 3 realizes a sealing effect.

[0052] The first sealing member 2 comprises a first ring portion 21, a second ring portion 22, and a tapered ring portion 24. These three ring portions are coaxially arranged with the passage 19. The second ring portion 22 is connected between the first ring portion 21 and the tapered ring portion 24. The wall thickness of the second ring portion 22 increases from the first ring portion 21 toward the tapered ring portion 24. The wall thickness of the tapered ring portion 24 decreases away from the first ring portion 21. The small end of the tapered ring portion 24 is located opposite the first ring portion 21 and defines an end through-hole 241 for the puncture needle 20 or surgical instrument to pass through in a sealed manner. When the puncture needle 20 or surgical instrument enters the sealing assembly, it passes through the first ring portion 21, the second ring portion 22, and the tapered ring portion 24 in sequence, and then passes through the small end of the tapered ring portion 24. It is understood that the inner diameter of the small end of the tapered ring portion 24 is smaller than the diameter of the puncture needle 20 and the surgical instrument, that is, Figure 7 The diameter of the end through hole 241 of the small end of the tapered ring portion 24 shown in the figure is smaller than the diameters of the puncture needle 20 and the surgical instrument, so that the puncture needle 20 and the surgical instrument can be sealed through the small end of the tapered ring portion 24.

[0053] This embodiment provides a sealing mechanism 30, a trocar, and a surgical robot. The sealing mechanism 30 includes an encapsulating shell and a sealing assembly, the trocar includes the sealing mechanism 30 and a sheath 10, and the surgical robot includes the trocar. Because the wall thickness at the connection between the first ring portion 21 and the second ring portion 22 is relatively thin, and the wall thickness of the tapered ring portion 24 toward the second ring portion 22 is relatively thick, during the penetration of the puncture needle 20 or surgical instrument into the sealing mechanism 30, not only the tapered ring portion 24 but also the connection between the first ring portion 21 and the second ring portion 22 can deform. In this embodiment, the sealing mechanism 30 has a simple structure, and the number of deformation positions of the first sealing member 2 is increased, which reduces the deformation amount at each deformation position, facilitates the resetting of the first sealing member 2 after the puncture needle 20 or surgical instrument is pulled out, and facilitates the reinsertion of other surgical instruments. It also reduces the possibility of damage to the first sealing member 2 due to the large deformation amount at the same position, improves the fatigue strength of the first sealing member 2, improves the durability of the sealing mechanism 30, avoids the replacement of the sealing mechanism 30 during surgery, reduces costs, and enables the sealing mechanism 30 to reliably achieve a sealing effect, ensuring the safety of the surgery and the smooth implementation of the surgery; at the same time, the second ring portion 22 and the tapered ring portion 24 are thicker at one end facing each other, reducing the possibility of the tapered ring portion 24 completely flipping up after the puncture needle 20 or surgical instrument is pulled out, which further facilitates the resetting of the tapered ring portion 24.

[0054] In this embodiment, the thickness of the connection between the first ring portion 21 and the second ring portion 22 needs to ensure that: when the puncture needle 20 or surgical instrument penetrates and contacts the tapered ring portion 24, the first seal 2 first deforms at the connection between the first ring portion 21 and the second ring portion 22, causing the second ring portion 22 to expand outward. As the puncture needle 20 and the surgical instrument continue to penetrate, the tapered ring portion 24 deforms again. There is no specific size limit for the thickness of the connection between the first ring portion 21 and the second ring portion 22. Moreover, before the tapered ring portion 24 deforms, the second ring portion 22 may or may not abut the inner wall of the second seal 3, which is not limited here.

[0055] It will be understood that the small end of the tapered ring portion 24 has a smaller outer diameter, while the large end of the tapered ring portion 24 has a larger outer diameter. In this embodiment, the large end of the tapered ring portion 24 faces the first ring portion 21, while the small end faces away from the first ring portion 21. The outer diameter of the tapered ring portion 24 decreases as it moves away from the first ring portion 21, and the inner diameter of the tapered ring portion 24 decreases as it moves away from the first ring portion 21, so that the wall thickness of the tapered ring portion 24 decreases as it moves away from the first ring portion 21. The inner diameters of the first ring portion 21, the second ring portion 22, and the large end of the tapered ring portion 24 are all larger than the diameters of the puncture needle 20 and the surgical instrument, facilitating their insertion into the sealing mechanism 30. It will be understood that because the diameter of the through hole 241 at the end is smaller than the diameters of the puncture needle 20 and the surgical instrument, the tapered ring portion 24 inevitably deforms when the puncture needle 20 and the surgical instrument pass through the sealing mechanism 30.

[0056] As a preferred solution, Figure 4-Figure 7 As shown, the first seal 2 also includes a third ring portion 23 coaxially arranged with the penetration channel 19. The wall thickness of the third ring portion 23 is a constant value, and the third ring portion 23 is connected between the second ring portion 22 and the tapered ring portion 24. The wall thickness of the third ring portion 23 is the same as the maximum wall thickness of the second ring portion 22. By providing the third ring portion 23, the length of the thicker wall portion is increased, the structural strength of the first seal 2 is increased, the durability of the first seal 2 and the reliability during surgery are improved, and the possibility of damage to the first seal 2 is reduced, so that the sealing mechanism 30 can reliably perform the sealing function, ensuring the safety of the surgery, avoiding the need to replace the sealing mechanism 30 during surgery, reducing costs, and facilitating the resetting of the first seal 2, making it easier to reinsert other surgical instruments after removing the puncture needle 20 and surgical instruments, ensuring the smooth implementation of the surgery.

[0057] Furthermore, the outer diameter of the third ring portion 23 is constant. Based on the aforementioned "the wall thickness of the third ring portion 23 is constant," it follows that the inner diameter of the third ring portion 23 is also constant. This arrangement simplifies the structure of the first sealing member 2 and facilitates production and processing.

[0058] In this embodiment, the wall thickness of the first ring portion 21 is a constant value, that is, the wall thickness of the first ring portion 21 is the same throughout. This facilitates production and processing and reduces production costs while ensuring a small thickness at the connection between the first ring portion 21 and the second ring portion 22. In other embodiments, the wall thickness of the first ring portion 21 may decrease toward the second ring portion 22.

[0059] As a preferred solution, the outer diameter of the first ring portion 21 is constant. Based on the aforementioned description of the constant wall thickness of the first ring portion 21, the inner diameter of the first ring portion 21 is also constant. This configuration simplifies the structure of the first sealing member 2 and facilitates production and processing.

[0060] As a preferred embodiment, the outer diameter of the second ring portion 22 decreases as it moves away from the first ring portion 21. Specifically, the outer wall of the second ring portion 22 is a tapered surface. The larger end of the second ring portion 22 is connected to the first ring portion 21, and the smaller end of the second ring portion 22 is connected to the third ring portion 23. The outer diameter of the first ring portion 21 is greater than the outer diameter of the third ring portion 23. The outer diameter of the first ring portion 21 is the same as the outer diameter of the larger end of the second ring portion 22, and the outer diameter of the third ring portion 23 is the same as the outer diameter of the smaller end of the second ring portion 22. Similar to the tapered ring portion 24, the smaller end of the second ring portion 22 is the end with the smaller outer diameter, and the larger end of the second ring portion 22 is the end with the larger outer diameter. The above arrangement increases the distance between the outer wall of the third ring portion 23 and the inner wall of the second seal 3. This ensures that when the connection between the first ring portion 21 and the second ring portion 22 deforms, the third ring portion 23 and the tapered ring portion 24 have ample room to maneuver, preventing the tapered ring portion 24 from obstructing the puncture needle 20 and surgical instruments. This allows for smooth passage of the puncture needle 20 and surgical instruments, ensuring smooth surgical execution. This also reduces the likelihood of damage to the first seal 2, avoids the need to replace the sealing mechanism 30, and reduces maintenance costs. Furthermore, as described above, "the outer diameter of the first ring portion 21 is constant, the outer diameter of the second ring portion decreases away from the first ring portion 21, and the outer diameter of the third ring portion 23 is constant, while the outer diameter of the tapered ring portion 24 decreases away from the first ring portion 21." This means that the outer diameter of the first seal 2 decreases overall from the first ring portion 21 to the tapered ring portion 24, facilitating installation of the first seal 2 within the second seal 3.

[0061] As a preferred solution, a guide ring 11 is provided on the packaging shell. The guide ring 11 is coaxially arranged with the penetration channel 19 . The guide ring 11 is used to ensure that the puncture needle 20 and the surgical instrument penetrate into or out of the sealing mechanism 30 along the penetration channel 19 .

[0062] Furthermore, the encapsulation shell includes a top cover 1, which is provided with a through hole coaxially arranged with the sheath tube 10, and a guide ring 11 connected to the end face of the top cover 1 and arranged circumferentially along the through hole. The through hole forms a port for a penetration channel 19, through which a puncture needle 20 and surgical instruments can enter the penetration channel 19. The first seal 2 is provided with one end of the first ring portion 21 disposed toward the top cover 1, that is, the top cover 1 is placed on the side of the first seal 2 away from the conical ring portion 24 along the first direction. The guide ring 11 is placed in the first seal 2, and the guide ring 11 extends to the third ring portion 23 at one end opposite to the top cover 1. By providing the guide ring 11, the tip of the end effector of the surgical instrument or the puncture needle 20 can be guided to the thicker third ring portion 23 and the tapered ring portion 24, thereby avoiding contact between the tip of the end effector of the surgical instrument or the puncture needle 20 and other positions of the first seal 1, reducing the possibility of the first seal 1 being scratched, avoiding the need to replace the sealing mechanism 30 during surgery, reducing costs, and enabling the sealing mechanism 30 to reliably perform the sealing function, ensuring the safety of the surgery and the smooth implementation of the surgery; and the end of the guide ring 11 is extended to the thicker third ring portion 23, when the puncture needle 20 or surgical instrument is pulled out, the guide ring 11 can stop the third ring portion 23 from flipping up, and at the same time, the connection between the first ring portion 21 and the second ring portion 22 does not deform or the deformation is small, which is further conducive to the resetting of the first seal 2 and facilitates the reinsertion of other surgical instruments.

[0063] As a preferred embodiment, the distance between the third ring portion 23 and the guide ring 11 is smaller than the distance between the third ring portion 23 and the second sealing member 3, that is, the distance between the inner side wall of the third ring portion 23 and the outer side wall of the guide ring 11 is smaller than the distance between the outer side wall of the third ring portion 23 and the inner side wall of the second sealing member 3. The smaller inner diameter of the third ring portion 23 is conducive to reducing the radial dimension of the sealing mechanism 30, reducing the possibility of collision and interference between the puncture device and other structures of the surgical robot, and ensuring the safety of the operation. At the same time, when the puncture needle 20 and the surgical instrument penetrate the sealing mechanism 30, due to the larger distance between the third ring portion 23 and the second sealing member 3, the third ring portion 23 has a larger range of movement, ensuring that the puncture needle 20 and the surgical instrument can be smoothly penetrated. Moreover, when the puncture needle 20 and the surgical instrument are pulled out, due to the smaller distance between the third ring portion 23 and the guide ring 11, the deformation range of the third ring portion 23 is limited, and the guide ring 11 also ensures that the third ring portion 23 prevents the third ring portion 23 from turning up, further facilitating the resetting of the tapered ring portion 24, facilitating the reinsertion of other surgical instruments.

[0064] Furthermore, the outer diameter of the guide ring 11 is a fixed value, and the outer diameter of the guide ring 11 is the same as the inner diameter of the third ring portion 23, or the outer diameter of the guide ring 11 is slightly smaller than the inner diameter of the third ring portion 23. In this embodiment, the outer diameter of the guide ring 11 is slightly smaller than the inner diameter of the third ring portion 23, and the difference between the outer diameter of the guide ring 11 and the inner diameter of the third ring portion 23 is 0.1 to 0.4 mm. The above-mentioned size setting, under the premise of ensuring that "the connection between the first ring portion 21 and the second ring portion 22 does not deform or the deformation is small" as described above is achieved, makes it easy for the guide ring 11 to penetrate into the first seal 2, avoids setting the outer diameter of the guide ring 11 and the inner diameter of the second ring portion 23 to the same value, reduces the demand for dimensional accuracy, reduces the difficulty of assembly and processing, and thus reduces production costs.

[0065] In addition, according to the description in the previous article, the outer diameter of the second ring portion 22 decreases in the direction away from the first ring portion 21, and the guide ring 11 extends to the third ring portion 23 at one end opposite to the top cover 1, and the distance between the third ring portion 23 and the guide ring 11 is smaller than the distance between the third ring portion 23 and the second seal 3, so that the third ring portion 23 is arranged close to the guide ring 11, avoiding the need to additionally set other structures on the first seal 2 for abutting against the guide ring 11 and limiting the upward flipping of the third ring portion 23, simplifying the structure of the first seal 2, reducing the space occupied by the first seal 2, and also facilitating production and processing.

[0066] Preferably, if Figure 7 As shown, the end of the guide ring 11 is opposite to one end of the third ring portion 23 close to the conical ring portion 24, so that the guide ring 11 overlaps with most of the third ring portion 23, thereby improving the stopping effect of the guide ring 11 on the third ring portion 23, facilitating the resetting of the first seal 2, and at the same time does not affect the deformation of the conical ring portion 24, thereby ensuring that the puncture needle 20 and the surgical instrument can be smoothly inserted or pulled out.

[0067] As a preferred solution, the inner side wall of the guide ring 11 away from the top cover 1 is provided with an inclined annular surface 111, and the diameter of the inclined annular surface 111 increases in the direction away from the top cover 1, that is, the diameter of the inclined annular surface 111 close to the conical ring portion 24 is larger. When the puncture needle 20 and the surgical instrument are pulled out, the inclined annular surface 111 can have a guiding effect, which is beneficial for the puncture needle 20 and the surgical instrument to move along the insertion channel 19; and when the puncture needle 20 and the surgical instrument are pulled out, if the conical ring portion 24 is turned up, the conical ring portion 24 may be located between the guide ring 11 and the surgical instrument or the puncture needle 20. The provision of the inclined annular surface 111 can increase the space between the guide ring 11 and the surgical instrument or the puncture needle 20 for accommodating the conical ring portion 24, reducing the possibility of the conical ring portion 24 being squeezed between the guide ring 11 and the surgical instrument or the puncture needle 20, thereby hindering the removal of the puncture needle 20 and the surgical instrument, ensuring that the puncture needle 20 and the surgical instrument can be smoothly inserted or removed, facilitating the re-insertion of other surgical instruments, ensuring the smooth implementation of the operation, improving the efficiency of removing the puncture needle 20 or replacing the surgical instrument, avoiding increasing the user's fatigue, reducing the possibility of causing secondary harm to the patient, and ensuring the safety of the operation. In this embodiment, the inclined annular surface 111 is arranged along the circumference of the guide ring 11 .

[0068] As a preferred embodiment, a first protrusion 231 protrudes from the connection between the third ring portion 23 and the tapered ring portion 24. The first protrusion 231 is located on the inner sidewall of the first sealing member 2. When the puncture needle 20 or surgical instrument is removed, the first protrusion 231 abuts against the end of the guide ring 11 to limit the upward tilt of the tapered ring portion 24. This facilitates the timely repositioning of the tapered ring portion 24, facilitating the reinsertion of other surgical instruments and ensuring a smooth surgical procedure. Furthermore, the placement of the first protrusion 231 at the connection between the third ring portion 23 and the tapered ring portion 24 increases the thickness of the connection between the third ring portion 23 and the tapered ring portion 24, further reducing the possibility of the tapered ring portion 24 tilting upward, facilitating the reinsertion of other surgical instruments. In this embodiment, the first protrusion 231 is integrally formed with the first sealing member 2. The first protrusion 231 is annular and arranged along the circumference of the first sealing member 2.

[0069] Furthermore, a second protrusion 232 is protruding from the outer wall of the third ring portion 23 . When the puncture needle 20 or surgical instrument penetrates into the sealing mechanism 30 , the second protrusion 232 can abut against the inner wall of the second sealing member 3 . When the second protrusion 232 abuts against the inner wall of the second sealing member 3, if the third ring portion 23 continues to deform as the puncture needle 20 or surgical instrument continues to penetrate, the third ring portion 23 will produce a deformation amount at the position where the second protrusion 232 is set, further increasing the number of deformation positions on the first sealing member 2 and reducing the deformation amount at each deformation position. This is beneficial for resetting the first sealing member 2 after the puncture needle 20 or surgical instrument is pulled out, facilitating the reinsertion of other surgical instruments, and also reducing the possibility of damage to the first sealing member 2 due to a large deformation amount at the same position, thereby improving the fatigue strength of the first sealing member 2 and the durability of the sealing mechanism 30, avoiding the need to replace the sealing mechanism 30 during surgery, reducing costs, and enabling the sealing mechanism 30 to reliably perform a sealing function, thereby ensuring the safety of the surgery and the smooth implementation of the surgery. Moreover, by providing the second protrusion 232, the deformation range of the connection between the first ring portion 21 and the second ring portion 22 can be limited, further improving the fatigue strength of the first sealing member 1. In this embodiment, the second protrusion 232 is integrally formed with the first sealing member 2. The second protrusion 232 is annular and arranged along the circumference of the first sealing component 2 .

[0070] Specifically, the package housing further includes a mounting base 4, which, together with the top cover 1, defines a housing space within which the first and second sealing members 2 and 3 are positioned. The mounting base 4 is tubular and coaxially arranged with the sheath 10. One axial end of the mounting base 4 is connected to the top cover 1, allowing the puncture needle 20 and surgical instruments to pass through the through-hole in the top cover 1, into the passage 19 of the sealing mechanism 30, and exit through the end of the mounting base 4 distal from the top cover 1.

[0071] In this embodiment, the mounting seat 4 is placed in the sheath tube 10 , and the end of the mounting seat 4 exposed at the first end of the sheath tube 10 is connected to the top cover 1 .

[0072] Furthermore, the first sealing member 2 also includes a first crimping edge 25, which is connected to the outer side wall of the first ring portion 21 and is located at one end of the first ring portion 21 away from the second ring portion 22. The first crimping edge 25 is arranged along the circumference of the first ring portion 21. The second sealing member 3 includes a sealing tube 31 and a second crimping edge 33. The sealing tube 31 is coaxially arranged with the sheath tube 10, and the integral cylindrical structure formed by the first ring portion 21, the second ring portion 22, the third ring portion 23 and the conical ring portion 24 is placed in the sealing tube 31. The second crimping edge 33 is connected to the outer side wall of the sealing tube 31 and is located at one end of the sealing tube 31 facing the top cover 1, and the first crimping edge 25 is placed on the side of the second crimping edge 33 facing the top cover 1. The first crimping edge 25 and the second crimping edge 33 are placed between the end faces of the top cover 1 and the mounting seat 4, and the top cover 1 is fixedly connected to the mounting seat 4 to compress the first crimping edge 25 and the second crimping edge 33, thereby achieving the first sealing member 2 and the second sealing member 3 being fixedly arranged in the packaging shell.

[0073] In this embodiment, the top cover 1 and the mounting base 4 can be fixedly connected by adhesive bonding, welding, screws, or other fasteners, which are not limited here. The first crimping edge 25 extends annularly along the circumference of the first ring portion 21, and the second crimping edge 33 extends annularly along the circumference of the sealing sleeve 31. After the sealing mechanism 30 is installed, the first sealing member 2 and the second sealing member 3 are coaxially arranged.

[0074] Preferably, the sealing mechanism 30 further includes a spacer 61, which is coaxially disposed with the mounting base 4. The spacer 61 is positioned between the first crimping edge 25 and the second crimping edge 33. After the top cover 1 is fixedly connected to the mounting base 4, the first crimping edge 25 is tightly clamped between the spacer 61 and the top cover 1, and the second crimping edge 33 is tightly clamped between the spacer 61 and the mounting base 4.

[0075] Furthermore, a first abutment ring 12 is provided on the end of the top cover 1 facing the mounting seat 4, and the first abutment ring 12 is coaxially arranged with the mounting seat 4. A convex ring 65 is coaxially and protrudingly provided on the end face of the spacer 61 facing the top cover 1, and the first abutment ring 12 and the convex ring 65 are arranged opposite each other. The first crimping edge 25 is clamped between the first abutment ring 12 and the convex ring 65. A mating portion 44 is protrudingly provided on the outer wall of the mounting seat 4 at the end facing the top cover 1, and a second abutment ring 45 is provided on the end face of the mating portion 44 facing the top cover 1. Both the mating portion 44 and the second abutment ring 45 are arranged along the circumference of the mounting seat 4. The second crimping edge 33 is clamped between the second abutment ring 45 and the end face of the spacer 61. The provision of the first abutment ring 12, the second abutment ring 45, the spacer 61, and the raised ring 65 ensures reliable clamping of the first crimping edge 25 and the second crimping edge 33, thereby improving the structural stability of the sealing mechanism 30, reducing the possibility of the first seal 2 and the second seal 3 falling off when the puncture needle 20 and surgical instruments pass through the sealing mechanism 30, and ensuring the sealing performance of the sealing mechanism 30. It will be understood that the top cover 1 is annular, with an inner diameter smaller than the inner diameter of the mounting seat 4 and an outer diameter larger than the outer diameter of the mounting seat 4. In this embodiment, the outer diameter of the top cover 1 is the same as the outer diameter of the mating portion 44.

[0076] It can be understood that since the first crimping edge 25 is compressed and clamped between the first abutting ring 12 and the convex ring 65, and the second crimping edge 33 is compressed and clamped between the second abutting ring 45 and the spacer 61, gas cannot pass through the gaps between the first seal 2, the second seal 3, the spacer 61, the mounting seat 4 and the top cover 1.

[0077] In this embodiment, the first ring portion 21, the second ring portion 22, the third ring portion 23, the tapered ring portion 24, and the first crimping edge 25 are integrally formed. The sealing cylinder 31 and the second crimping edge 33 are integrally formed. The first sealing member 2 and the second sealing member 3 are both made of rubber.

[0078] In this embodiment, the top cover 1 is provided with a plurality of connecting tubes 8, and the mounting base 4 is provided with a plurality of first positioning posts 71. Each of the first positioning posts 71 corresponds to each of the connecting tubes 8. The first positioning posts 71 extend through the corresponding connecting tubes 8 and form an interference fit with the connecting tubes 8. The first positioning posts 71 and the connecting tubes 8 are used to determine the relative position between the top cover 1 and the mounting base 4. Specifically, the first positioning posts 71 are provided on the mating portion 44 of the mounting base 4. The first positioning posts 71 are evenly spaced along the circumference of the mounting base 4, and the connecting tubes 8 are evenly spaced along the circumference of the top cover 1.

[0079] In this embodiment, a second positioning column 72 is also provided on the mating portion 44, and a positioning hole 9 for the second positioning column 72 to pass through is provided on the spacer 61 and the second crimping edge 33. The second positioning column 72 can be passed through the positioning hole 9 to limit the position of the spacer 61 and the second sealing member 3 in the packaging shell.

[0080] Specifically, the sealing mechanism 30 includes a snap-fit ​​member 6, which includes a snap-fit ​​portion 64. The end of the first end of the sheath tube 10 is bent outward and provided with a flange 101. The snap-fit ​​portion 64 can be snapped onto the flange 101, thereby realizing a detachable connection between the packaging shell and the sheath tube 10.

[0081] The clamping member 6 includes an elastic connecting portion 62, a hook, and the aforementioned spacer 61. The edges of the spacer 61 at both ends in the radial direction are respectively connected to the elastic connecting portion 62, and the protruding ring 65 is located between the two elastic connecting portions 62. The end of the elastic connecting portion 62 opposite to the protruding ring 65 is connected to the hook. The hook includes a pressing portion 63 and the aforementioned clamping portion 64. The clamping portion 64 is located at the end of the hook facing the sheath tube 10, and the pressing portion 63 is located at the end of the hook away from the sheath tube 10. That is, the clamping portion 64 and the pressing portion 63 are respectively arranged at both ends of the elastic connecting portion 62. The elastic connecting portion 62 can undergo elastic deformation. When the user presses the pressing portion 63, the clamping portion 64 moves in a direction away from the axis of the spacer 61; when the user releases the pressing portion 63, the clamping portion 64 moves in a direction close to the axis of the spacer 61, so that the user can press and release the clamping portion 64 to disengage from or clamp onto the flange 101, thereby realizing a detachable connection between the packaging shell and the sheath tube 10.

[0082] It is understandable that the hook is located outside the matching portion 44, that is, the matching portion 44 is located between the two hooks. One end of the elastic connecting portion 62 away from the spacer 61 extends out of the matching portion 44 and connects to the corresponding hook.

[0083] Preferably, the mounting base 4 includes a first section 41 and a second section 42 arranged axially, and the first section 41 and the second section 42 are coaxially connected. The end of the first section 41 opposite the second section 42 is connected to the top cover 1. The outer wall of the first section 41 is provided with two first ribs 411 spaced apart along the axial direction. A sealing ring 412 is sleeved on the first section 41 and located in the gap between the two first ribs 411. The sealing ring 412 is used to ensure that the mounting base 4 is sealed and inserted into the sheath 10. The inner wall of the second section 42 is provided with a reinforcement 421. The end surface of the reinforcement 421 facing the axis of the mounting base 4 is flush with the inner wall of the first section 41. The second sealing member 3 includes the aforementioned sealing cylinder 31 and at least two sealing petals 32. The sealing petals 32 are provided at the opening of the sealing cylinder 31 at one end away from the top cover 1. The at least two sealing petals 32 can move away from or toward each other to open or close the opening of the sealing cylinder 31. The outer diameter of the sealing cylinder 31 is smaller than the inner diameter of the first section 41.

[0084] In this embodiment, the first rib 411, the first section 41, the second section 42 and the reinforcement portion 421 are integrally formed. The sealing cylinder 31 and the sealing flap 32 are integrally formed.

[0085] In this embodiment, the reinforcing portion 421 is arranged in the second section 42 rather than in the first section 41, thereby avoiding the radial overlap of the reinforcing portion 421 with the first rib 411 and the sealing ring 412, making the thickness of the first section 41 thinner. In addition, compared with setting the second section 42 flush with the inner side wall of the first section 41, the end face of the reinforcing portion 421 of this embodiment is flush with the inner side wall of the first section 41, avoiding the structure protruding from the inner side wall of the mounting seat 4, reducing the possibility of affecting the insertion or extraction of the puncture needle 20 and the surgical instrument, and increasing the portion where the first section 41 and the second section 42 overlap in thickness, which can reduce the overall thickness of the mounting seat 4, thereby reducing the volume of the puncture device and reducing the possibility of interference and collision between the puncture device and other structures of the surgical robot. At the same time, compared with directly forming the reinforcement portion by milling the inner wall of the first section 41, the structural strength of the first section 41 is guaranteed, and the reinforcement portion 421 is set on the second section 42, which improves the structural strength of the second section 42, ensures the durability of the mounting seat 4 and the puncture device, avoids the need to replace the sealing mechanism 30 during surgery, and reduces costs; in addition, when the puncture device or surgical instrument penetrates the sealing mechanism, the second sealing member 3 is deformed, and the reinforcement portion 421 can prevent the second sealing member 3 from having a large deformation amount, which is beneficial to the resetting of the second sealing member 3, ensuring that the second sealing member 3 can close the penetration channel in time after the puncture device and surgical instrument are pulled out, thereby ensuring the sealing effect of the sealing mechanism and the air pressure in the patient's abdominal cavity, thereby improving the safety of the operation.

[0086] As a preferred embodiment, the first rib 411 is disposed circumferentially around the mounting base 4, i.e., the first rib 411 is annular, further increasing the structural strength of the first section 41 and the mounting base 4, thereby ensuring the durability of the mounting base 4 and the trocar. The sealing ring 412 is made of rubber. When the encapsulation shell is not placed within the sheath 10, i.e., in its natural state, the diameter of the sealing ring 412 is greater than the radial thickness of the first rib 411, allowing the sealing ring 412 to protrude beyond the first rib 411 and abut against the inner wall of the sheath 10, thereby ensuring that the mounting base 4 is sealed and inserted into the sheath 10.

[0087] Preferably, the outer diameter of the second section 42 is smaller than the outer diameter of the first rib 411, that is, the first rib 411 protrudes from the second section 42. When the puncture needle 20 or the surgical instrument that needs to be inserted into or removed from the sealing mechanism 30 is tilted, the first rib 411 can abut against the sheath 10, limiting the tilt degree of the mounting seat 4 and reducing the shaking amplitude of the sealing mechanism 30, making it easier for the puncture needle 20 or the surgical instrument to smoothly penetrate or remove the sealing mechanism 30, thereby ensuring the smooth implementation of the operation.

[0088] The outer diameter of the first rib 411 is slightly smaller than the inner diameter of the sheath 10, which facilitates the installation of the packaging shell into the sheath 10. In this embodiment, the difference between the outer diameter of the first rib 411 and the inner diameter of the sheath 10 is 0.1 to 0.4 mm. When the packaging shell is placed in the sheath 10, the sealing ring 412 abuts against the inner wall of the sheath 10, and the outer wall of the first rib 411 is spaced apart from the sheath 10. By providing two first ribs 411, when the puncture needle 20 or surgical instrument that needs to be inserted into or removed from the sealing mechanism 30 is tilted, one of the first ribs 411 can abut against the sheath 10 to limit the tilt of the mounting seat 4, making it easier for the puncture needle 20 or surgical instrument to smoothly penetrate or remove the sealing mechanism 30, thereby ensuring the smooth implementation of the operation. In other embodiments, the outer diameter of the first rib 411 can also be the same as the inner diameter of the sheath 10, which is not limited here.

[0089] As a preferred embodiment, multiple reinforcement portions 421 are evenly spaced along the circumference of the mounting base 4, further enhancing the structural strength of the second section 42 and the mounting base 4, ensuring the durability of the mounting base 4 and the trocar, avoiding the need to replace the sealing mechanism 30 during surgery, reducing costs, and ensuring smooth surgical procedures. The number of reinforcement portions 421 provided can be adjusted as needed and is not limited herein.

[0090] Furthermore, the reinforcement portion 421 extends along the axial direction of the mounting seat 4 to facilitate production and processing.

[0091] In this embodiment, two sealing flaps 32 are provided. The two sealing flaps 32 form an opening of the second sealing member 3 at one end away from the sealing tube 31, and the ends of the sealing flaps 32 away from the sealing tube 31 can move away from or approach each other to open or close the opening of the second sealing member 3. When the puncture needle 20 and the surgical instrument are inserted into the sealing mechanism 30, the puncture needle 20 and the surgical instrument are placed in the opening of the second sealing member 3, that is, the opening of the second sealing member 3 is in an open state; when the puncture needle 20 and the surgical instrument are pulled out of the sealing mechanism 30, the two sealing flaps 32 move closer to each other at one end away from the sealing tube 31, and the opening of the second sealing member 3 is in a closed state, thereby ensuring the sealing effect of the sealing mechanism 30. In other embodiments, the number of sealing flaps 32 can be adaptively adjusted according to needs and is not limited here.

[0092] When the puncture needle 20 or the surgical instrument is inserted into the sealing mechanism 30, the puncture needle 20 and the surgical instrument pass through the opening of the second seal 3, that is, the opening of the second seal 3 is in an open state, and the puncture needle 20 or the surgical instrument is sealed and inserted into the end through hole 241 of the conical ring portion 24 of the first seal 2. At this time, the first seal 2 realizes the sealing effect; when the puncture needle 20 or the surgical instrument is pulled out, the two sealing petals 32 are close to each other at one end away from the sealing tube 31, and the opening of the second seal 3 is in a closed state. At this time, the second seal 3 realizes the sealing effect.

[0093] Preferably, the reinforcing portion 421 extends to the sealing flap 32 at one end away from the first section 41. During the opening and closing process of the opening of the second sealing member 3, the sealing flap 32 will deform. The above arrangement increases the structural strength of the second section 42 corresponding to the sealing flap 32, reduces the possibility of squeezing the second section 42 during the deformation process, causing deformation or even damage to the second section 42, and improves the durability of the sealing mechanism 30, thereby enabling the sealing mechanism 30 to reliably perform its sealing function, ensuring the safety and smooth implementation of the operation, avoiding the need to replace the sealing mechanism 30 during the operation, and reducing costs.

[0094] In this embodiment, the end surface of the reinforcement portion 421 away from the first section 41 is arranged perpendicular to the axis of the mounting base 4. It should be understood that "the end of the reinforcement portion 421 away from the first section 41 extends to the sealing flap 32" means that the plane where the end surface of the reinforcement portion 421 away from the first section 41 is located passes through the sealing flap 32.

[0095] Preferably, a connecting portion 422 is protruding from the inner sidewall of the second section 42. The connecting portion 422 extends along the circumference of the second section 42 and is connected to at least two reinforcing portions 421. The connecting portion 422 is disposed directly opposite the sealing flap 32. The provision of the connecting portion 422 further increases the structural strength of the second section 42 corresponding to the sealing flap 32, reduces the possibility of deformation or even damage to the second section 42 caused by squeezing during the deformation of the sealing flap 32, and improves the durability of the sealing mechanism 30. This allows the sealing mechanism 30 to reliably perform its sealing function, ensuring the safety and smooth implementation of the surgery, while avoiding the need to replace the sealing mechanism 30 during surgery and reducing costs.

[0096] Specifically, the end surface of the connecting portion 422 facing the axis of the mounting base 4 is flush with the inner sidewall of the first section 41. That is, the end surface of the reinforcing portion 421 facing the axis of the mounting base 4 is flush with the end surface of the connecting portion 422 facing the axis of the mounting base 4. This arrangement reduces the possibility of the connecting portion 422 interfering with the insertion or removal of the puncture needle 20 and surgical instruments, ensuring the smooth implementation of the surgery.

[0097] like Figure 11The cases shown are examples only. Figure 11 A connecting portion 422 connects three reinforcing portions 421. In this case, two connecting portions 422 can be provided, and the two connecting portions 422 are arranged opposite to the two sealing petals 32; in some cases, the connecting portion 422 can also be arranged along the circumference of the second section 42, so that the connecting portion 422 is annular and connected to all the reinforcing portions 421.

[0098] Furthermore, the trocar includes an air valve 5, which is used to connect to an external air source during preoperative preparation to create a pneumoperitoneum environment. The sealing mechanism 30 includes the aforementioned air valve 5, which is connected to the outer wall of the first section 41 of the mounting base 4. The first section 41 is radially penetrated by a vent hole 413, which is connected to the air valve 5, allowing an external air source to enter the mounting base 4 through the air valve 5.

[0099] Preferably, a ventilation groove 414 is formed on the inner sidewall of the first section 41. The ventilation groove 414 communicates with the ventilation hole 413. The ventilation groove 414 extends along the axis and communicates with the inner sidewall of the second section 42 and the space formed between the second sealing member 3. This arrangement allows gas from an external gas source to enter the space formed between the inner sidewall of the second section 42 and the second sealing member 3 through the gas valve 5 and be injected into the patient's abdominal cavity, avoiding the need for a separate ventilation line, simplifying the structure of the trocar, and facilitating a reduction in size.

[0100] It is understood that the vent 413 is located between the end surface of the first section 41 facing the top cover 1 and the first rib 411, and the air valve 5 is located outside the first end of the sheath tube 10. Because the second crimping edge 33 is tightly clamped between the second abutment ring 45 and the spacer 61, gas from the external air source can only flow into the patient's abdominal cavity through the space formed between the second section 42 and the second sealing member 3.

[0101] As a preferred solution, the depth of the ventilation groove 414 is less than the thickness of the reinforcement portion 421, so that a step surface 43 is formed between the first section 41 and the second section 42, thereby avoiding the thin wall thickness of the first section 41 at the ventilation groove 414, ensuring the structural strength of the first section 41 and the mounting seat 4, reducing the possibility of damage to the mounting seat 4, ensuring the durability of the mounting seat 4 and the puncture device, avoiding the need to replace the sealing mechanism 30 during surgery, and reducing costs.

[0102] As a preferred solution, the ventilation groove 414 is located between two adjacent reinforcement parts 421, which prevents the reinforcement part 421 from obstructing the gas entering through the ventilation groove 414, so that the gas can enter the patient's abdominal cavity in time through the space formed between the second section 42 and the second seal 3, ensuring the rate of gas input, thereby facilitating the formation of a pneumoperitoneum environment at an appropriate speed and ensuring the smooth implementation of the operation.

[0103] In this embodiment, the connection portion 422 is not provided in the space between the two reinforcement portions 421 on both sides of the ventilation groove 414, thereby preventing the connection portion 422 from obstructing the input of gas into the patient's abdominal cavity.

[0104] Preferably, the width of the ventilation groove 414 is the same as the distance between the two reinforcement parts 421 on both sides thereof. The width of the ventilation groove 414 is determined according to the distance between the two adjacent reinforcement parts 421, which is convenient for production and processing. At the same time, since the depth of the ventilation groove 414 is relatively small, the above setting makes the width of the ventilation groove 414 larger, and can also ensure the rate of gas input, thereby facilitating the formation of a pneumoperitoneum environment at an appropriate speed, ensuring the smooth implementation of the operation.

[0105] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Sealing mechanism, characterized in that, include: The packaging shell is penetrated along the first direction to form a penetration channel; A sealing assembly is placed in the packaging shell and includes a first sealing member and a second sealing member, both of which are cylindrical. The second sealing member is spaced apart and sleeved on the first sealing member. The first sealing member includes a first ring portion, a second ring portion and a conical ring portion arranged along the axial direction of the penetration channel. The second ring portion is connected between the first ring portion and the conical ring portion. The wall thickness of the second ring portion increases from the first ring portion toward the conical ring portion, and the wall thickness of the conical ring portion decreases in the direction away from the first ring portion. The small end of the conical ring portion is arranged opposite to the first ring portion. When the puncture needle or surgical instrument penetrates the sealing assembly, it passes through the first ring portion, the second ring portion and the conical ring portion in sequence, and seals through the small end of the conical ring portion.

2. The sealing mechanism according to claim 1, wherein: The first sealing component further includes a third ring portion, the wall thickness of the third ring portion is a constant value, and the third ring portion is connected between the second ring portion and the conical ring portion.

3. The sealing mechanism according to claim 2, wherein: The outer diameter of the third ring portion is a constant value.

4. The sealing mechanism according to claim 2, wherein: The packaging shell includes a top cover, which is placed on a side of the first sealing member away from the conical ring portion along the first direction. A guide ring is connected to the top cover, which is placed in the first sealing member. The end of the guide ring away from the top cover extends to the third ring portion.

5. The sealing mechanism according to claim 4, characterized in that: A distance between an inner sidewall of the third ring portion and an outer sidewall of the guide ring is smaller than a distance between an outer sidewall of the third ring portion and an inner sidewall of the second sealing member.

6. The sealing mechanism according to claim 4, wherein: An inner side wall of the guide ring at one end away from the top cover is provided with an inclined annular surface, and a diameter of the inclined annular surface increases in a direction away from the top cover.

7. The sealing mechanism according to any one of claims 1 to 6, characterized in that: The outer diameter of the second ring portion decreases in a direction away from the first ring portion; and / or the outer diameter of the first ring portion is a constant value.

8. The sealing mechanism according to any one of claims 1 to 6, characterized in that: The wall thickness of the first ring portion is a constant value; or the wall thickness of the first ring portion decreases gradually in a direction toward the second ring portion.

9. A trocar, characterized in that: It comprises a sheath tube and a sealing mechanism according to any one of claims 1 to 8, wherein the sealing mechanism is placed in the sheath tube, and the penetration channel is coaxially arranged with the sheath tube.

10. A surgical robot, characterized in that Comprising the trocar as claimed in claim 9.

Images